Since 2009, OSU archaeologists have conducted excavations at the Cooper's Ferry site in order to clarify issues related to the timing and nature of human occupation held in its stratified deposits. To deal with known problems of site disturbance and its effects on the associative context between cultural materials and radiocarbon dated samples, archaeologists have implemented and developed new methods of excavation and evaluation of site formation processes. Their careful approach is slow but appears to be working. Dr. Davis will discuss highlights from the last four field seasons and present more than two dozen new radiocarbon dates that are bringing the site's geochronology into focus. Dr. Davis will also present the discovery of many cultural features and discuss the coming summer's excavations.